local intelligence

can it run

Can the RTX 4090 (24GB, used) run llama3.1 70B?

NO

No. 24GB of memory can't hold the 54GB working set this model needs. A smaller quant or a bigger machine is required.

~11–18 tok/s

weights 43GB + KV cache 1.25GB at 4k context vs ~24GB usable → no. 44.2 GB vs 24 GB usable — does not fit

computed roofline: 1008 GB/s × 0.46–0.76 efficiency window / 43.0GB (Q4_K_M) — bands, never points.

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Specs

model file43GB (GGUF Q4_K_M)
minimum memory54GB working set
this machine24GB GDDR6X
params70B
licensellama3.1 (gated on HF)
price$2000

Run it

model files: hugging face ↗

easy run: ollama pull llama3.1:70b

runs with: ollama · llama.cpp · koboldcpp · lm studio

Alternatives

NIMO AI Mini PC (128GB) — cheapest machine that runs it ($1999)

rtx-5090 — the next step up from this machine's GPU

Buy

eBay (used) ↗ · Amazon (new) ↗

2026-09-17 · ← full hardware catalog · prices verified at source, may drift